Since 2006, TOMS has been a popular name when the discussion turns to brands that support social causes. TOMS' social cause is more than providing footwear -- it includes initiatives to help provide clean water, eyewear, medical procedures and safe births, local jobs, education and training. It's a robust business model that has helped the company achieve success.

It begs the question: In the digital age, do companies need a social cause to thrive?